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/* Dump registers.
Copyright (C) 2018-2020 Free Software Foundation, Inc.
This file is part of the GNU C Library.
The GNU C Library is free software; you can redistribute it and/or
modify it under the terms of the GNU Lesser General Public
License as published by the Free Software Foundation; either
version 2.1 of the License, or (at your option) any later version.
The GNU C Library is distributed in the hope that it will be useful,
but WITHOUT ANY WARRANTY; without even the implied warranty of
MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
Lesser General Public License for more details.
You should have received a copy of the GNU Lesser General Public
License along with the GNU C Library. If not, see
<https://www.gnu.org/licenses/>. */
#include <sys/uio.h>
#include <_itoa.h>
#include <bits/sigcontext.h>
#include <ucontext.h>
/* abiv1 register dump in this format:
PSR: XXXXXXXX PC: XXXXXXXX SP: XXXXXXXX LR: XXXXXXXX
MASK: XXXXXXXX
A0: XXXXXXXX A1: XXXXXXXX A2: XXXXXXXX A3: XXXXXXXX
R6: XXXXXXXX R7: XXXXXXXX R8: XXXXXXXX R9: XXXXXXXX
R10: XXXXXXXX R11: XXXXXXXX R12: XXXXXXXX R13: XXXXXXXX
R14: XXXXXXXX R1: XXXXXXXX
abiv2 register dump in this format:
PSR: XXXXXXXX PC: XXXXXXXX SP: XXXXXXXX LR: XXXXXXXX
MASK: XXXXXXXX
A0: XXXXXXXX A1: XXXXXXXX A2: XXXXXXXX A3: XXXXXXXX
R4: XXXXXXXX R5: XXXXXXXX R6: XXXXXXXX R7: XXXXXXXX
R8: XXXXXXXX R9: XXXXXXXX R10: XXXXXXXX R11: XXXXXXXX
R12: XXXXXXXX R13: XXXXXXXX R14: XXXXXXXX R15: XXXXXXXX
R16: XXXXXXXX R17: XXXXXXXX R18: XXXXXXXX R19: XXXXXXXX
R20: XXXXXXXX R21: XXXXXXXX R22: XXXXXXXX R23: XXXXXXXX
R24: XXXXXXXX R25: XXXXXXXX R26: XXXXXXXX R27: XXXXXXXX
R28: XXXXXXXX R29: XXXXXXXX R30: XXXXXXXX R31: XXXXXXXX
*/
static void
hexvalue (unsigned long int value, char *buf, size_t len)
{
char *cp = _itoa_word (value, buf + len, 16, 0);
while (cp > buf)
*--cp = '0';
}
static void
register_dump (int fd, const struct ucontext_t *ctx)
{
char regs[35][8];
struct iovec iov[97];
size_t nr = 0;
#define ADD_STRING(str) \
iov[nr].iov_base = (char *) str; \
iov[nr].iov_len = strlen (str); \
++nr
#define ADD_MEM(str, len) \
iov[nr].iov_base = str; \
iov[nr].iov_len = len; \
++nr
/* Generate strings of register contents. */
hexvalue (ctx->uc_mcontext.__gregs.__sr, regs[0], 8);
hexvalue (ctx->uc_mcontext.__gregs.__pc, regs[1], 8);
hexvalue (ctx->uc_mcontext.__gregs.__usp, regs[2], 8);
hexvalue (ctx->uc_mcontext.__gregs.__lr, regs[3], 8);
hexvalue (ctx->uc_mcontext.__gregs.__a0, regs[4], 8);
hexvalue (ctx->uc_mcontext.__gregs.__a1, regs[5], 8);
hexvalue (ctx->uc_mcontext.__gregs.__a2, regs[6], 8);
hexvalue (ctx->uc_mcontext.__gregs.__a3, regs[7], 8);
hexvalue (ctx->uc_mcontext.__gregs.__regs[0], regs[8], 8);
hexvalue (ctx->uc_mcontext.__gregs.__regs[1], regs[9], 8);
hexvalue (ctx->uc_mcontext.__gregs.__regs[2], regs[10], 8);
hexvalue (ctx->uc_mcontext.__gregs.__regs[3], regs[11], 8);
hexvalue (ctx->uc_mcontext.__gregs.__regs[4], regs[12], 8);
hexvalue (ctx->uc_mcontext.__gregs.__regs[5], regs[13], 8);
hexvalue (ctx->uc_mcontext.__gregs.__regs[6], regs[14], 8);
hexvalue (ctx->uc_mcontext.__gregs.__regs[7], regs[15], 8);
hexvalue (ctx->uc_mcontext.__gregs.__regs[8], regs[16], 8);
hexvalue (ctx->uc_mcontext.__gregs.__regs[9], regs[17], 8);
hexvalue (ctx->uc_mcontext.__gregs.__exregs[0], regs[18], 8);
hexvalue (ctx->uc_mcontext.__gregs.__exregs[1], regs[19], 8);
hexvalue (ctx->uc_mcontext.__gregs.__exregs[2], regs[20], 8);
hexvalue (ctx->uc_mcontext.__gregs.__exregs[3], regs[21], 8);
hexvalue (ctx->uc_mcontext.__gregs.__exregs[4], regs[22], 8);
hexvalue (ctx->uc_mcontext.__gregs.__exregs[5], regs[23], 8);
hexvalue (ctx->uc_mcontext.__gregs.__exregs[6], regs[24], 8);
hexvalue (ctx->uc_mcontext.__gregs.__exregs[7], regs[25], 8);
hexvalue (ctx->uc_mcontext.__gregs.__exregs[8], regs[26], 8);
hexvalue (ctx->uc_mcontext.__gregs.__exregs[9], regs[27], 8);
hexvalue (ctx->uc_mcontext.__gregs.__exregs[10], regs[28], 8);
hexvalue (ctx->uc_mcontext.__gregs.__exregs[11], regs[29], 8);
hexvalue (ctx->uc_mcontext.__gregs.__exregs[12], regs[30], 8);
hexvalue (ctx->uc_mcontext.__gregs.__exregs[13], regs[31], 8);
hexvalue (ctx->uc_mcontext.__gregs.__exregs[14], regs[32], 8);
hexvalue (ctx->uc_mcontext.__gregs.__tls, regs[33], 8);
/* Generate the output. */
ADD_STRING ("Register dump:\n\n PSR: ");
ADD_MEM (regs[0], 8);
ADD_STRING (" PC: ");
ADD_MEM (regs[1], 8);
ADD_STRING (" SP: ");
ADD_MEM (regs[2], 8);
ADD_STRING (" LR: ");
ADD_MEM (regs[3], 8);
ADD_STRING ("\n\n A0: ");
ADD_MEM (regs[4], 8);
ADD_STRING (" A1: ");
ADD_MEM (regs[5], 8);
ADD_STRING (" A2: ");
ADD_MEM (regs[6], 8);
ADD_STRING (" A3: ");
ADD_MEM (regs[7], 8);
ADD_STRING ("\n R4: ");
ADD_MEM (regs[8], 8);
ADD_STRING (" R5: ");
ADD_MEM (regs[9], 8);
ADD_STRING (" R6: ");
ADD_MEM (regs[10], 8);
ADD_STRING (" R7: ");
ADD_MEM (regs[11], 8);
ADD_STRING ("\n R8: ");
ADD_MEM (regs[12], 8);
ADD_STRING (" R9: ");
ADD_MEM (regs[13], 8);
ADD_STRING (" R10: ");
ADD_MEM (regs[14], 8);
ADD_STRING (" R11: ");
ADD_MEM (regs[15], 8);
ADD_STRING ("\n R12: ");
ADD_MEM (regs[16], 8);
ADD_STRING (" R13: ");
ADD_MEM (regs[17], 8);
ADD_STRING (" R14: ");
ADD_MEM (regs[2], 8);
ADD_STRING (" R15: ");
ADD_MEM (regs[3], 8);
ADD_STRING ("\n R16: ");
ADD_MEM (regs[18], 8);
ADD_STRING (" R17: ");
ADD_MEM (regs[19], 8);
ADD_STRING (" R18: ");
ADD_MEM (regs[20], 8);
ADD_STRING (" R19: ");
ADD_MEM (regs[21], 8);
ADD_STRING ("\n R20: ");
ADD_MEM (regs[22], 8);
ADD_STRING (" R21: ");
ADD_MEM (regs[23], 8);
ADD_STRING (" R22: ");
ADD_MEM (regs[24], 8);
ADD_STRING (" R23: ");
ADD_MEM (regs[25], 8);
ADD_STRING ("\n R24: ");
ADD_MEM (regs[26], 8);
ADD_STRING (" R25: ");
ADD_MEM (regs[27], 8);
ADD_STRING (" R26: ");
ADD_MEM (regs[28], 8);
ADD_STRING (" R27: ");
ADD_MEM (regs[29], 8);
ADD_STRING ("\n R28: ");
ADD_MEM (regs[30], 8);
ADD_STRING (" R29: ");
ADD_MEM (regs[31], 8);
ADD_STRING (" R30: ");
ADD_MEM (regs[32], 8);
ADD_STRING (" R31: ");
ADD_MEM (regs[33], 8);
ADD_STRING ("\n");
/* Write the stuff out. */
writev (fd, iov, nr);
}
#define REGISTER_DUMP register_dump (fd, ctx)
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